feat(aia): Protocol Agent streaming + editable state panel + protocol generation plan

Day 2 Development (2026-01-24):

Backend Enhancements:
- Implement SSE streaming in ProtocolAgentController using createStreamingService
- Add data condensation via LLM in ProtocolOrchestrator.handleProtocolSync
- Support stage editing without resetting progress
- Add explicit JSON output format for each stage in system prompt
- Create independent seed script for Protocol Agent (seed-protocol-agent.ts)

Frontend Improvements:
- Integrate useAIStream hook for typewriter effect in ChatArea
- Add MarkdownContent component for basic Markdown rendering
- Implement StageEditModal for editing stage data (scientific question, PICO, etc.)
- Add edit button to StageCard (visible on hover)
- Fix routing paths from /aia to /ai-qa
- Enhance CSS with full-screen layout and Markdown styles

New Documentation:
- One-click protocol generation development plan (v1.1)
- Editor selection evaluation (Novel vs BlockNote vs Tiptap)
- Novel fork strategy for AI-native editing

Technical Decisions:
- Choose Novel (Fork) as protocol editor for AI-first design
- Two-stage progressive generation: summary in chat, full protocol in editor
- 10-day development plan for protocol generation feature

Code Stats:
- Backend: 3 files modified, 1 new file
- Frontend: 9 files modified, 2 new files
- Docs: 3 new files

Status: Streaming and editable features working, protocol generation pending

backend/prisma/seed.ts

@@ -395,6 +395,7 @@ async function main() {
   // 11. 跳过Prompt模板（表尚未创建）
   // ============================================
   console.log('📌 跳过Prompt模板创建（capability_schema.prompt_templates 尚未创建）');
+  console.log('💡 提示：Protocol Agent 配置请运行独立脚本: npx tsx prisma/seed-protocol-agent.ts');
 
   // ============================================
   // 12. 创建租户模块订阅